Fuse for projectiles



July 7, 1931. H. H. ZORNIG 1,813,106 FUSE FOR PROJECTILES Filed Aug. l,' 1928 2 Sheets-Sheet l- I 71 A Maw Harm arm H Zurnig I July 7, 1931. H. H; ZORNIG FUSE FOR PROJECTILES Filed Aug. 1. 1928 2 Sheets-Sheet 2 gme'nioo Elam/M1 Hermann H Z1:11nig I 39 the improved fuse shown in the unarmed Patented July 7, 1931 "PATENT @r Fi-o E .IlIISE .FOR PROJECTILES jAp'plicatiomfile'd August 1','1928. SeriaINo. 296,783.

-.(GRAN TED *U-NDER mm: :A'c'r or 'nancn's, 11883, AS-AMENDEDAPRIL'30;1928; 370 '0. e. 757

The invention described herein -may be manufactured and used .byJor-for the Grov- .-.ernment for, governmental purposes, .without the paymenttos me of any royalty thereon. U The-subject ofthis inventionisa .fusefor projectiles. I

In separate loading ammunition themuzzle velocity and the consequent speed ofrotation eo'f the projectile variesin-a ccordanee'withithe 5 powder charge. A considerationof-this va :ria-tion in.the. speed-.of .rotationof the proj ectile has led to the design of the'presentlifuse in which isvincorpora'teda novelarming .device whose'movement tofreleased position is :g initiated on set-back and completed on rotation of theprojectile. p

Vllith the foregoing and other' objects in view, my invention resides in the novel arrangement and I combination of parts and in the -.details of -.eo.nstruction hereinafter .described and claimed, it being-.under-stoodnthat changes in'the precise embodimentpf the invention herein disclosed-maybe.made with- .in theiscope of whati-s claimedwithoutrdeparting from the spiritof the rinvention.

.A pracstical gembodimen't of the invention is illustrated in the accompanying drawings, wherein: I j j Fig. 1 is a longitudinal sectional View of position;

Fig. 2 is a similar View showing the parts in the armed position;

Figs. 3 to 6 are sectional views taken on .5 their respective lines of Fig. 1;

Fig. 7 is a view in elevation of the explosive train assembly before insertion in the fuse casing.

Referring to the drawings by numerals of reference:

The invention is illustrated in connection with a combination fuse which may be set to provide instantaneous or delay functioning on impact. The fuse container consists of a tubular body 5 to which is attached a head 6. Within the body is a carrier 7 having an axial explosive train, including a primer 8, a delay element 9 and a detonator 10, and also formed with non-axial flash passages 11 converging to the detonator. Mounted forwardly ofthe carrier. and held theretoby a sleeve 12 is a flash tube 13 whose flash passages are incommunication withthe primer 8 and with the nonsaxial passages 11. .Interposed between-the carrierandfiash-tubeis a shutter v: ltwhich maybe moved'to close thenonaxial path of ignition transmission 11 ileadingdirectlyto the detonator. 'lhe axial pathrlead- ,ingto the primer 8 za-nd-delay elementfl"is always open. Movement (of the shutter is accomplished .through thesleeve 12' which is formediat its lower end with "spaced prongs .15 between whichaare disposed peripheral lugs '16 of the "shutter. The prongs of the SlVQ ar6' bBI1t-/ ,inwardly to engage inan annular recess 17 in' the carrier. Stamped from-the upper-portion ofthe sleeve are fingers 18 bent inwardly .to restrain the flash tubeagainstlongitudinal. displacement and also toengage in .periph gr'zn =eral recesses 19 in the .flange of a rotata'bly :mounted plunger 20 'so that mutation of the plunger will be transmitted: tot-he shutter.

The plunger isin the form 50f. a tubewhich is mounted on the flash tubeandcarriesin- -.termediate its ends a primer detonatorr21 which risato .be fired b-y'a striker 22mount-ed in the head 6 of the fuse. Secured-toithe forward portion of the plunger is -.a,-squared 1 cap .23 vinserted through a correspondingly 3o Vshaped.apertureiin af setting disk Qt-marginallysseatedon. an annular shoulder 25 atlthe .tforward-iend of the fuse body. The disk .is .formed -with peripheral .recessesz26-.in which are [inserted fingers 27 .stamped from thews flanger28 of. a. setting sleeve .29 so' that upon rotation -ofthe-sleevemthe disk and plunger will p-artakeofithis movement. The .flange 28 of the. sleeve :rests on: the. marginal por- \tion. .of \thezdisk rand both memb-ers are 190 secured ,against longitudinal displacement whenrthe.fuseqheaditi is attached to-thefuse .body.

. .Ernloraci'ng the plungerin .rear of the squared cap- 23is a cage 30 confining an arm- .ing'spring 31 which .is. seatedonla .ring 32 .on theforwardend of the sleeve .12..and. a1lso confining .a creep spring- 33 [which is seated .on the'base of .the plung'er. The .springs31 and .33:-.are separatedibyfla.sleeve 3.4..having forwardly extending projections 35 which serve for securing blades 36 to the cage. The blades are preferably four in number, spaced equidistantly, and reinforced by a longitudinal rib 37. Their free extremities each terminate in a latch head 38 engageable in notches or cavities 39 in a retaining ring 40 (see Figs. 4 and 7) fixed to the carrier. When the blades are thus engaged the cage will be held against the action of the arming spring 31 and the plunger will correspondingly be held in the unarmed position as shown in Fig. 1.

Disengagement of the blades is initiated when the force of set-back occasioned by firing a projectile causes the cage and blades to travel to the rear and when this force has abated the centrifugal force due to rotation of the projectile will throw the blades outwardly until the latch heads contact the inner wall of the fuse body in which position they will be clear of the retaining ring 40. The arming spring 31 then acts to move the cage forwardly until it is brought up against the setting disk. The cage by engaging the squared cap 23 of the plunger carries the plunger to the armed position as shown in Fig. 2 where the primer detonator is within the stroke of the firing pin on impact.

The blades are also utilized to releasably hold a spring actuated ring 41 which embraces the carrier 7 and is formed with a depending finger 42 positioned in the path of a movable detonator carrier which in the present instance is shown as a centrifugally operable slide 43 carrying a detonator 44. The slide and its casing 45 are retained in place by a booster casing 46. When the cage is moved to the armed positionthe ring 41 will be moved by its spring 47 to withdraw V the finger 42 and permit the slide to arm.

Movement of the ring 41 is arrested by the retaining ring 40.

I claim:

1. In a fuse, an explosive train carrier, a plunger mounted on the carrier, a cage embracing the plunger and engageable therewith, a creep spring confined between the cage and plunger, an arming spring confined between the cage and the carrier, a sleeve separating the springs and secured to the cage, spaced blades secured to the cage and terminating in latch heads, a retaining ring fixed on the carrier and formed with recesses for receiving the latch heads, a ring embracing the carrier, a spring holding the ring in contact with the ends of the latch heads, a depending finger on the ring and a movable detonator carrier held in unarmed position by the finger. I

2. In a fuse,an explosive train carrier, a

fined between the cage and the carrier, a sleeve separating the springs and secured to the cage, spaced blades secured to the cage and terminating in latch heads, and a retaining ring fixed on the carrier and formed with recesses for receiving the latch heads.

3. In a fuse, an explosive train carrier, a plunger mounted on the carrier, a cage embracing the plunger and engageable therewith, an arming spring confined between the cage and the carrier, spaced blades secured to the cage and terminating in latch heads, and a retaining ring fixed on the carrier and formed with recesses for receiving the latch heads.

4. In a fuse, a cage, a spring for moving the cage, a plunger mounted for movement by the cage and also for independent movement, spaced blades secured to the cage and terminating in latch heads, and a fixed retaining ring formed with recesses for receiving the latch heads.

5. In a fuse, a member mounted for longitudinal movement, means releasable on setback thereof by centrifugal force for latching said member against movement, a transversely movable member and spring actuated means retained by the latching means for opposing movement of the transverse memher.

6. In a fuse, a member mounted for longitudinal movement, a member mounted for transverse movement and longitudinally disposed means releasable on set-back thereof by centrifugal force for holding said members against movement.

7. In a fuse, a member mounted for longitudinal movement thereof, a member mounted for transverse movement thereof and means for holding said members having first a longitudinal and then a radial movement in releasing. Y

HERMANN H. ZORNIG.

plunger mounted on the carrier, a cage embracing the plunger and engageable therewith, a creep spring confined between the cage and plunger, an arming spring con- 

